Please help-blank monitor

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system-hp pavilion a705w

when monitor is powerd on after 3 seconds it clicks and the green light becomes yellow.

i dont hear any beeps except for one small one at the very beg. of boot up.

everything is stock, except a compatible 1GB RAM card i installed just one day before this started occuring. After the ram install, the comp was working good. but now this.

these is no video card. should i buy a new power supply or a video card? thank you for your help.


ive also tried unplugging everything for 15 min. and trying again to no avail. and i also know that the monitor is not the problem.

thanx again.
 
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